A temperature control method and system suitable for vehicle motor circuit

Abstract

The present application provides a temperature control method and system for a vehicle motor circuit. Components within the motor circuit include a motor, a motor controller, an onboard onboard controller (OBC), and a DC-DC converter. The method includes: obtaining temperature information fed back from each component, including motor temperature information, motor controller temperature information, OBC temperature information, and DC-DC temperature information; setting a first temperature control strategy for charging conditions based on the motor and motor controller temperature information; and setting a second temperature control strategy for non-charging conditions based on the OBC and DC-DC temperature information; and controlling the motor circuit temperature below a preset threshold based on the first and second temperature control strategies. Implementation of this method can reduce vehicle costs.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and more specifically, to a temperature control method and system applicable to a motor circuit of a vehicle. Background Art

[0002] As competition in the automotive industry becomes increasingly fierce, cost control of automobiles is becoming increasingly important while ensuring the safety, environmental protection, energy saving and intelligence of automobile functions. Therefore, under the premise of ensuring the complete functions and reliable performance of the vehicle, it is necessary to optimize the hardware cost of the vehicle so that the vehicle has sufficient competitiveness in price.

[0003] From the perspective of the vehicle's thermal management system, the VCU (the core electronic control unit that makes vehicle control decisions) ensures that the temperature of the motor circuit does not exceed the design threshold by controlling the water pump, valves, fans, and air intake grille based on signals from temperature and pressure sensors, thereby ensuring the longevity of the vehicle's components. Vehicle components primarily include the motor, motor controller, onboard OBC, DC-DC converter, battery, and engine.

[0004] However, existing technologies typically incorporate temperature sensors into motor circuits to ensure the circuit temperature does not exceed a design threshold. Based on the temperature signal fed back by the sensors, the system actively activates the air intake grille or fan to dissipate heat, thereby preventing components in the motor circuit from overheating and achieving temperature control. However, the cost of installing temperature sensors in motor circuits is considerable, hindering overall vehicle cost reduction. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a temperature control method and system applicable to the motor circuit of a whole vehicle, which can reduce the cost of the whole vehicle.

[0006] The present application also provides a temperature control method for a motor circuit of a vehicle. The components provided in the motor circuit include a motor, a motor controller, an on-board OBC, and a DC-DC converter. The method includes:

[0007] Acquire temperature information fed back by each of the components, the temperature information including motor temperature information, motor controller temperature information, OBC temperature information, and DCDC temperature information;

[0008] Setting a first temperature control strategy applicable to a charging condition based on the motor temperature information and the motor controller temperature information, and setting a second temperature control strategy applicable to a non-charging condition based on the OBC temperature information and the DCDC temperature information;

[0009] Based on the first temperature control strategy and the second temperature control strategy, the temperature of the motor circuit is controlled to be below a preset temperature threshold.

[0010] In a second aspect, an embodiment of the present application further provides a temperature control system for a vehicle motor circuit, the system comprising a temperature information acquisition module, a temperature control strategy setting module, and a circuit temperature control module, wherein:

[0011] The temperature information acquisition module is used to acquire temperature information fed back by each of the components, wherein the temperature information includes motor temperature information, motor controller temperature information, OBC temperature information and DCDC temperature information;

[0012] The temperature control strategy setting module is configured to set a first temperature control strategy applicable to a charging condition based on the motor temperature information and the motor controller temperature information, and to set a second temperature control strategy applicable to a non-charging condition based on the OBC temperature information and the DCDC temperature information;

[0013] The loop temperature control module is configured to control the temperature of the motor loop to be below a preset temperature threshold based on the first temperature control strategy and the second temperature control strategy.

[0014] In a third aspect, an embodiment of the present application further provides a readable storage medium, which includes a temperature control method program applicable to the motor circuit of a whole vehicle. When the temperature control method program applicable to the motor circuit of a whole vehicle is executed by a processor, the steps of a temperature control method applicable to the motor circuit of a whole vehicle as described in any one of the above items are implemented.

[0015] As can be seen from the foregoing, the embodiments of the present application provide a temperature control method, system, and readable storage medium suitable for a vehicle motor circuit. On the one hand, the present invention eliminates the need for temperature sensors in the motor circuit. Instead, temperature control strategies are developed and optimized using temperature information transmitted by components such as the motor, motor controller, onboard OBC, and DC-DC converter. This replaces physical sensors with control strategies, ensuring effective temperature control while also reducing vehicle costs. Furthermore, developing appropriate temperature control strategies based on operating conditions can improve the simulation accuracy of the motor circuit temperature, making the control method more targeted and improving temperature control precision.

[0016] Other features and advantages of the present application will be described in the following description and, in part, will become apparent from the description or be understood by practicing the embodiments of the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A flow chart of a temperature control method for a motor circuit of a vehicle provided in an embodiment of the present application;

[0019] Figure 2 It is the structural diagram of the motor circuit;

[0020] Figure 3 This is a schematic diagram of the temperature control logic flow of the motor circuit under different working conditions;

[0021] Figure 4 A schematic structural diagram of a temperature control system suitable for a vehicle motor circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work fall within the scope of protection of the present application.

[0023] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0024] Please refer to Figure 1 , Figure 1 This is a flow chart of a temperature control method for a vehicle motor circuit in some embodiments of the present application. Figure 2For understanding, the components (the components) in the motor circuit are not currently limited to the positions of the components and the heat dissipation components) include a motor, a motor controller, an on-board OBC, and a DCDC converter. Taking the method applied to the controller as an example, the method includes the following steps:

[0025] Step S1 , obtaining temperature information fed back by each of the components, wherein the temperature information includes motor temperature information, motor controller temperature information, OBC temperature information, and DCDC temperature information.

[0026] Step S2: setting a first temperature control strategy applicable to a charging condition based on the motor temperature information and the motor controller temperature information, and setting a second temperature control strategy applicable to a non-charging condition based on the OBC temperature information and the DCDC temperature information.

[0027] Step S3: Based on the first temperature control strategy and the second temperature control strategy, the temperature of the motor circuit is controlled to be below a preset temperature threshold.

[0028] As can be seen from the above, the temperature control method disclosed in this application, applicable to the entire vehicle motor circuit, eliminates the need for temperature sensors in the motor circuit. Instead, the temperature control strategy is developed and optimized using temperature information transmitted by components such as the motor, motor controller, onboard OBC, and DC-DC converter. This control strategy replaces physical sensors, ensuring effective temperature control while also reducing vehicle costs. Furthermore, developing appropriate temperature control strategies based on operating conditions can improve the simulation accuracy of the motor circuit temperature, making the control method more targeted and enhancing temperature control precision.

[0029] In one embodiment, each of the components is internally provided with a temperature sensing module and a temperature feedback module, wherein: the temperature sensing module is used to sense the temperature information of the component; the temperature feedback module is used to feed back the sensed temperature information.

[0030] Specifically, each component has a temperature sensing module integrated therein, and during implementation, no additional temperature sensing module will be provided inside each component.

[0031] In one embodiment, the temperature sensing module may include at least one of an NTC thermistor, a temperature transmitter, and a temperature sensor. The temperature feedback module is electrically connected to the controller and feeds back the sensed temperature information to the controller.

[0032] NTC thermistor refers to a negative temperature coefficient thermistor, which is made of metal oxides such as manganese, cobalt, nickel and copper as the main materials and is manufactured using ceramic technology.

[0033] Temperature transmitters can use thermocouples and thermal resistors as temperature measuring elements. They can convert temperature variables into transmittable standardized output signals and are mainly used for measuring and controlling temperature parameters in industrial processes.

[0034] A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. Temperature sensors are the core component of temperature measuring instruments and come in a wide variety. They can be categorized by measurement method: contact and non-contact. They can also be divided into RTDs and thermocouples based on the sensor material and electronic component characteristics.

[0035] In one embodiment, the heat dissipation components arranged in the motor circuit include an electronic three-way valve, an air intake grille and a fan, wherein: the electronic three-way valve dissipates heat by controlling the valve opening and controlling the flow of chilled water; the air intake grille dissipates heat by connecting to external natural wind and utilizing the rapidly flowing air; the fan dissipates heat through energy conversion and forced heat convection.

[0036] Specifically, the controller is electrically connected to the heat dissipation component and simulates the motor circuit temperature based on the received temperature information. The controller, based on the simulated motor circuit temperature, will control the electronic three-way valve to open for preliminary heat dissipation control when it determines that the motor circuit needs to be controlled for heat dissipation (i.e., the motor circuit temperature reaches the first temperature, wherein the first temperature can be specified as 28°C. When the controller determines that the motor circuit temperature reaches 28°C, it will perform primary intensity heat dissipation control). Afterwards, within the specified time (the specified time is not currently limited and can be set according to actual conditions, for example, 10 minutes), if the heat dissipation effect is not good (i.e., the motor circuit temperature rises instead of falling) and continues to rise to the second temperature (wherein the second temperature can be Designated as 32°C, when the controller determines that the motor circuit temperature rises from 28°C to 32°C, it will perform medium-intensity heat dissipation control), keep the electronic three-way valve open, and control the air intake grille to open, and achieve heat dissipation and cooling by increasing the heat dissipation intensity; finally, when the motor circuit temperature continues to rise from the second temperature to the third temperature (wherein, the second temperature can be designated as 54°C. It can be understood that in the current embodiment, the controller will perform high-intensity heat dissipation control when determining that the motor circuit temperature rises from 32°C to 54°C), the controller will control the opening of all heat dissipation components to perform high-intensity heat dissipation control.

[0037] Based on the above, it can be understood that when the controller determines that the motor circuit temperature meets the preset temperature control conditions, it will automatically trigger and activate these heat dissipation components. Through the logic relationship of triggering layer by layer, as the motor circuit temperature rises, it can first trigger the electronic three-way valve to perform primary heat dissipation control. Then, if the controller determines that the motor circuit temperature is rising instead of falling (i.e., the heat dissipation effect is not being achieved), it will gradually activate the air intake grille and fan to dissipate heat, so as to control the motor circuit temperature below the preset temperature threshold, avoid damage to components when the motor circuit temperature is too high, and extend the service life of components.

[0038] In practice, the controller can also control the opening ratio of the electronic three-way valve, air intake grille, and fan to improve the heat dissipation effect. Based on actual usage, the maximum opening ratio of each heat dissipation component is expected to reach 100%.

[0039] In one embodiment, in step S3, under charging conditions, when executing the first temperature control strategy to perform heat dissipation control, the method includes: obtaining the motor temperature information and the motor controller temperature information, and simulating the first motor circuit temperature under the charging condition based on any one of the motor temperature information and the motor controller temperature information; when it is determined that the first motor circuit temperature meets the target heat dissipation condition, performing heat dissipation control.

[0040] Specifically, during charging conditions, the first temperature control strategy is considered based on the motor temperature information and the motor controller temperature information because the motor and motor controller are inoperative during charging conditions. The temperatures of these two components are essentially the same as the motor circuit temperature. Therefore, simulating the first motor circuit temperature during charging conditions based on either the motor temperature information or the motor controller temperature information can provide more targeted simulation results. Subsequently, upon determining that the first motor circuit temperature satisfies the aforementioned layer-by-layer triggering logic, the controller controls the heat dissipation components to perform heat dissipation control. The specific heat dissipation control logic can be found in the previous section and will not be further explained.

[0041] In another embodiment, in step S3, when executing the first temperature control strategy to perform heat dissipation control under charging conditions, the method includes: obtaining the temperature information of the motor controller, and simulating the first motor circuit temperature under charging conditions based on the motor controller temperature information; and performing heat dissipation control when it is determined that the first motor circuit temperature meets the target heat dissipation conditions.

[0042] Specifically, unlike the implementation scheme of simulating the first motor circuit temperature under charging conditions based on any one of the motor temperature information and the motor controller temperature information, in the current embodiment, considering that the motor controller temperature drops very quickly and can approach the motor circuit temperature faster, in order to improve the temperature control accuracy, it is currently considered to simulate the first motor circuit temperature under charging conditions based on the motor controller temperature information.

[0043] In one embodiment, before simulating the first motor circuit temperature under the charging condition based on the motor controller temperature information, the method further includes: determining the validity of the motor controller temperature information; when it is determined that the motor controller temperature information is invalid, obtaining the motor temperature information, and simulating the first motor circuit temperature under the charging condition based on the motor temperature information.

[0044] Specifically, in order to avoid the influence of the failure of the motor controller temperature information on the temperature control judgment, the current embodiment adds the judgment of the failure of the motor controller temperature information on the basis of the above content, that is, before simulating the first motor circuit temperature under the charging condition based on the motor controller temperature information, the validity of the motor controller temperature information will be judged. If the judgment is valid, the motor circuit will be further controlled to dissipate heat based on the motor controller temperature information. If it fails, the first motor circuit temperature under the charging condition will be simulated based on the acquired motor temperature information.

[0045] Based on the above embodiment, it is optional to further extract information features when determining the validity of the motor controller temperature information, and determine the validity of the information based on the information features. For example, if it is known that the information failure features are "FF, ***", etc., a failure judgment standard based on this is preset. Subsequently, during the information validity judgment process, after extracting the target information features, it is further determined whether the target information features fall within the failure judgment standard, thereby obtaining a corresponding judgment result.

[0046] In one embodiment, in step S3, when executing the second temperature control strategy to perform heat dissipation control under non-charging conditions, the method includes: obtaining the OBC temperature information and the DCDC temperature information, and simulating the second motor circuit temperature under the non-charging condition based on any one of the OBC temperature information and the DCDC temperature information; and performing heat dissipation control when it is determined that the second motor circuit temperature meets the target heat dissipation condition.

[0047] Specifically, during non-charging conditions, the second temperature control strategy is considered based on the OBC temperature information and the DCDC temperature information because the vehicle's OBC and DCDC converters are inoperative during non-charging conditions, and the temperatures of these two components are essentially the same as the motor circuit temperature. Therefore, simulating the second motor circuit temperature during non-charging conditions based on either the OBC temperature information or the DCDC temperature information can improve temperature control accuracy.

[0048] Based on the aforementioned embodiments, it should be noted that when it is determined that the motor circuit temperature meets the target heat dissipation condition, the step of performing heat dissipation control includes: when it is determined that the motor circuit temperature is greater than a first temperature, triggering the electronic three-way valve to open to perform primary intensity heat dissipation control, wherein, during the heat dissipation process, the opening angle ratio of the electronic three-way valve increases synchronously with the increase of the motor circuit temperature; when it is determined that the opening angle ratio of the electronic three-way valve reaches 100%, but the motor circuit temperature still rises to a second temperature, maintaining the electronic three-way valve in an open state, and triggering the air intake grille to open to perform medium intensity heat dissipation control, wherein, during the heat dissipation process, the opening angle ratio of the air intake grille also increases synchronously with the increase of the motor circuit temperature; when it is determined that the opening angle ratio of the air intake grille reaches 100%, but the motor circuit temperature still rises to a third temperature, maintaining the electronic three-way valve and the air intake grille in an open state, and triggering the fan to open to perform high intensity heat dissipation control, wherein, the opening angle ratio of the fan also increases synchronously with the increase of the motor circuit temperature.

[0049] Based on the above embodiment, it should be noted that, in a specific embodiment, the heat dissipation control logic of the motor circuit can be understood according to the following steps:

[0050] Step 1: When it is determined that the motor circuit temperature is ≥28°C, the controller will control the electronic three-way valve to open. As the motor circuit temperature rises, the opening ratio of the electronic three-way valve will increase until it reaches 100%.

[0051] Step 2: When it is determined that the motor circuit temperature continues to rise to 32°C, the controller will control the electronic three-way valve to remain open and further control the opening of the air intake grille. As the motor circuit temperature rises, the opening ratio of the air intake grille will become larger and larger until it reaches 100%.

[0052] Step 3: When it is determined that the motor circuit temperature continues to rise to 54°C, the controller will control the electronic three-way valve and the air intake grille to remain open, and further control the fan to turn on. As the temperature rises, the fan opening ratio will increase until it reaches 100%.

[0053] In summary, the temperature control logic of the motor circuit under different working conditions can be referred to Figure 3 Understand. Figure 3 It can be seen that in the early stage of logic control, it will first determine whether the current motor circuit is in a charging condition; if so, the charging condition control will be performed. Under the charging condition, it will further determine whether the motor controller temperature is valid. If so, the heat dissipation control will be performed according to the motor controller temperature. Otherwise, the heat dissipation control will be performed according to the motor temperature. In addition, when it is determined that the current motor circuit is in a non-charging condition, the circuit temperature will be controlled according to the OBC temperature (of course, the DCDC temperature can also be selected). Finally, after the temperature control is completed, the analog temperature of the motor circuit will be output, and the output temperature value will be used for other logic controls, for example, controlling the opening of the electronic three-way valve 1 to 0 or 100, controlling the opening of the air intake grille, controlling the opening of the fan, etc.

[0054] Optionally, when it is determined that the motor circuit transitions from non-charging to charging mode, the circuit temperature will be controlled according to the OBC temperature for a certain period of time (for example, 60s, this time is a value verified by experiments); then, when it is determined that the motor circuit enters the charging mode, the circuit temperature will be controlled according to the OBC temperature. Figure 3 The circuit temperature control is performed based on the indicated sequence of the motor controller temperature and the motor temperature.

[0055] On the contrary, when it is determined that the motor circuit transitions from the charging state to the non-charging state, it will first be in a certain period of time (for example, 60s, this time is the value verified by the test) to Figure 3 The circuit temperature is controlled based on the order of the motor controller temperature and the motor temperature shown. Then, when it is determined that the motor circuit has entered a non-charging state, the circuit temperature is controlled based on the OBC temperature (or DCDC temperature).

[0056] Please refer to Figure 4 The present application discloses a temperature control system 400 applicable to a vehicle motor circuit. The system 400 includes a temperature information acquisition module 401, a temperature control strategy setting module 402, and a circuit temperature control module 403, wherein:

[0057] The temperature information acquisition module 401 is used to acquire temperature information fed back by each component, wherein the temperature information includes motor temperature information, motor controller temperature information, OBC temperature information and DCDC temperature information.

[0058] The temperature control strategy setting module 402 is used to set a first temperature control strategy applicable to a charging condition based on the motor temperature information and the motor controller temperature information, and to set a second temperature control strategy applicable to a non-charging condition based on the OBC temperature information and the DCDC temperature information.

[0059] The loop temperature control module 403 is configured to control the temperature of the motor loop to be below a preset temperature threshold based on the first temperature control strategy and the second temperature control strategy.

[0060] In one embodiment, each module in the system is further configured to execute a method in any optional implementation of the above embodiment.

[0061] As can be seen from the above, the temperature control system disclosed in this application, suitable for the entire vehicle motor circuit, eliminates the need for temperature sensors in the motor circuit. Instead, it formulates and optimizes temperature control strategies based on temperature information transmitted by components such as the motor, motor controller, onboard OBC, and DC-DC converter. This strategy replaces physical sensors, ensuring effective temperature control while also reducing vehicle costs. Furthermore, formulating appropriate temperature control strategies based on operating conditions can improve the simulation accuracy of the motor circuit temperature, making the control method more targeted and enhancing temperature control precision.

[0062] The present application provides a readable storage medium, wherein when the computer program is executed by a processor, the method in any optional implementation of the above embodiment is executed. The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0063] This readable storage medium eliminates the need for temperature sensors in the motor circuit. Temperature information transmitted by components such as the motor, motor controller, onboard OBC, and DC-DC converter allows for the development and optimization of temperature control strategies. This strategy replaces physical sensors, ensuring effective temperature control while reducing vehicle costs. Furthermore, developing appropriate temperature control strategies based on operating conditions improves the accuracy of motor circuit temperature simulation, making control more targeted and enhancing temperature control precision.

[0064] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0065] In addition, the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0066] Furthermore, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0067] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0068] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A temperature control method for a motor circuit of a vehicle, wherein the components arranged in the motor circuit include a motor, a motor controller, an on-board OBC, and a DC-DC converter, characterized in that: The method comprises: Acquire temperature information fed back by each of the components, the temperature information including motor temperature information, motor controller temperature information, OBC temperature information, and DCDC temperature information; Setting a first temperature control strategy applicable to a charging condition based on the motor temperature information and the motor controller temperature information, and setting a second temperature control strategy applicable to a non-charging condition based on the OBC temperature information and the DCDC temperature information; Based on the first temperature control strategy and the second temperature control strategy, controlling the temperature of the motor circuit to be below a preset temperature threshold; Under charging conditions, when the first temperature control strategy is executed to perform heat dissipation control, the method includes: Acquire the motor temperature information and the motor controller temperature information, and simulate the first motor circuit temperature under the charging condition based on either the motor temperature information or the motor controller temperature information; When it is determined that the temperature of the first motor circuit meets the target heat dissipation condition, performing heat dissipation control; In a non-charging condition, when the second temperature control strategy is executed to perform heat dissipation control, the method includes: acquiring the OBC temperature information and the DCDC temperature information, and simulating a second motor circuit temperature under a non-charging condition based on either the OBC temperature information or the DCDC temperature information; When it is determined that the temperature of the second motor circuit meets the target heat dissipation condition, heat dissipation control is performed.

2. The method according to claim 1, characterized in that Each of the components is equipped with a temperature sensing module and a temperature feedback module, wherein: The temperature sensing module is used to sense the temperature information of the component; The temperature feedback module is used to feed back the sensed temperature information.

3. The method according to claim 1, characterized in that The heat dissipation components provided in the motor circuit include an electronic three-way valve, an air intake grille, and a fan, wherein: The electronic three-way valve dissipates heat by controlling the valve opening and the flow of chilled water; The air intake grille is connected to the natural wind and uses the air flowing through it quickly to dissipate heat; The fan converts energy and dissipates heat by forced convection.

4. The method according to claim 3, characterized in that Under charging conditions, when the first temperature control strategy is executed to perform heat dissipation control, the method includes: Acquiring temperature information of the motor controller, and simulating a first motor circuit temperature under a charging condition based on the temperature information of the motor controller; When it is determined that the temperature of the first motor circuit meets the target heat dissipation condition, heat dissipation control is performed.

5. The method according to claim 4, characterized in that Before simulating the first motor circuit temperature under the charging condition based on the motor controller temperature information, the method further includes: Determining the validity of the motor controller temperature information; When it is determined that the motor controller temperature information is invalid, the motor temperature information is acquired, and the first motor circuit temperature under the charging condition is simulated based on the motor temperature information.

6. The method according to claim 4, characterized in that When it is determined that the motor circuit temperature meets the target heat dissipation conditions, the steps for heat dissipation control include: When it is determined that the motor circuit temperature is greater than the first temperature, the electronic three-way valve is triggered to open to perform primary intensity heat dissipation control, wherein during the heat dissipation process, the opening angle ratio of the electronic three-way valve increases synchronously with the increase of the motor circuit temperature; When it is determined that the opening angle ratio of the electronic three-way valve has reached 100%, but the motor circuit temperature still rises to the second temperature, the electronic three-way valve is kept open, and the air intake grille is triggered to open to perform medium-intensity heat dissipation control. During the heat dissipation process, the opening angle ratio of the air intake grille will also increase synchronously with the increase in the motor circuit temperature. When it is determined that the opening angle ratio of the air intake grille has reached 100%, but the motor circuit temperature still rises to the third temperature, the electronic three-way valve and the air intake grille are kept open, and the fan is triggered to start for high-intensity heat dissipation control. Among them, the opening angle ratio of the fan will also increase synchronously with the increase of the motor circuit temperature.

7. A temperature control system suitable for a vehicle motor circuit, characterized in that: The system includes a temperature information acquisition module, a temperature control strategy setting module and a loop temperature control module, wherein: The temperature information acquisition module is used to obtain temperature information fed back by various components, wherein the temperature information includes motor temperature information, motor controller temperature information, OBC temperature information and DCDC temperature information; The temperature control strategy setting module is configured to set a first temperature control strategy applicable to a charging condition based on the motor temperature information and the motor controller temperature information, and to set a second temperature control strategy applicable to a non-charging condition based on the OBC temperature information and the DCDC temperature information; The circuit temperature control module is configured to control the temperature of the motor circuit to be below a preset temperature threshold based on the first temperature control strategy and the second temperature control strategy; Under charging conditions, the circuit temperature control module executes the first temperature control strategy to perform heat dissipation control specifically as follows: Acquire the motor temperature information and the motor controller temperature information, and simulate the first motor circuit temperature under the charging condition based on either the motor temperature information or the motor controller temperature information; When it is determined that the temperature of the first motor circuit meets the target heat dissipation condition, performing heat dissipation control; Under non-charging conditions, the circuit temperature control module executes the second temperature control strategy to perform heat dissipation control specifically as follows: acquiring the OBC temperature information and the DCDC temperature information, and simulating a second motor circuit temperature under a non-charging condition based on either the OBC temperature information or the DCDC temperature information; When it is determined that the temperature of the second motor circuit meets the target heat dissipation condition, heat dissipation control is performed.

8. A readable storage medium, characterized in that: The readable storage medium includes a temperature control method program applicable to the motor circuit of the entire vehicle. When the temperature control method program applicable to the motor circuit of the entire vehicle is executed by the processor, the steps of the method as described in any one of claims 1 to 6 are implemented.

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